Composite lawn edging

Inactive Publication Date: 2001-07-03
AQUAPORE MOISTURE SYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The lawn edging of the invention contributes to the environment by using a recycled product that otherwise would accumulate and degrade the environment. The lawn edging of the in

Problems solved by technology

They are a fire hazard when stored in sites above the ground.
It is difficult to separate the steel and fabric cord from the rubber.
Since the rubber is revulcanized to a cross-linked

Method used

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  • Composite lawn edging
  • Composite lawn edging
  • Composite lawn edging

Examples

Experimental program
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example

A lawn edging was prepared from a mixture of 50 percent by weight of 30 mesh vulcanized rubber particles from tires and 50 percent linear, low density polyethylene pellets. The particles and pellets were mixed. The mixture was fed to a vented twin screw extrude heated to a temperature of 380.degree. F. The die was heated to a temperature from 360.degree. F. to 380.degree. F. As the mixture was extruded through a die orifice as shown in FIG. 5, lawn edging as depicted in FIGS. 2 and 3 was extruded.

The lawn edging was tested for bending and was substantially more flexible than commercial polyethylene lawn edging. The composite lawn edging was easily planted into a curved trench and showed no tendency to creep up out of the ground.

Further aspects of the invention are illustrated in FIG. 7. The lawn edging 10 formed from a rubber-thermoplastic resin is usually porous. Since the enlarged head 14 can be in hollow pipe form, it can be used as a drip emitter. When fitting 67 is connected to...

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PUM

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Abstract

The lawn edging (10) is formed by extruding a thermoplastic resin, preferably a thermoplastic resin such as polyethylene containing a dispersion of prevulcanized elastomer granules through a die (62) having a vertical die orifice (64) for forming the wall (12) of the channel (16). The vertical die orifice (64) also contains an element for forming protrusions (20) on a surface of the wall (12). The element preferably forms a horizontal edge on the protrusion (20). The feed rate of the element can be higher than the adjacent sections of the wall (12) such that the extruded material backs up in the die (62) and intermittently feeds through the outlet orifice (64). The channel (16) can contain a lower bead (34) and an upper hollow head member (14) which can be coated with a liquid impervious film (100) and perforated by a laser (120) to form spray apertures (122).

Description

This invention relates to a lawn barrier and more particularly this invention relates to an improved synthetic composite lawn edging which acts as a divider between lawn areas containing different types of plants or ground cover.1. Background of the InventionMany lawns are landscaped to contain discrete areas or beds of ground cover such as grass, plants or non-growing materials such as stone or bark. In order to prevent growth across the common border; it is quite common to install a physical barrier at the border such as strips of wood, metal, brick or cement walls, or lawn edging formed of synthetic resin.2. Description of the Prior ArtA popular form of synthetic resin lawn edging is in the form of a flange having an enlarged tube and a pair of anchoring means such as upwardly facing lips are provided between the lips and bottom of the flange as disclosed in U.S. Pat. No. 4,281,473.This lawn edging is formed from polyethylene. It is very rigid and inflexible. The edging is market...

Claims

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Application Information

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IPC IPC(8): A01G1/08A01G9/28
CPCA01G1/08A01G9/28
Inventor PRASSAS, THOMAS N.BARD, SHANNON
Owner AQUAPORE MOISTURE SYST
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